CN101615702A - Battery management system and driving method thereof - Google Patents

Battery management system and driving method thereof Download PDF

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Publication number
CN101615702A
CN101615702A CN200910146228A CN200910146228A CN101615702A CN 101615702 A CN101615702 A CN 101615702A CN 200910146228 A CN200910146228 A CN 200910146228A CN 200910146228 A CN200910146228 A CN 200910146228A CN 101615702 A CN101615702 A CN 101615702A
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China
Prior art keywords
battery
monocell
voltage
detection voltage
relay
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CN200910146228A
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Chinese (zh)
Inventor
林启钟
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/005—Detection of state of health [SOH]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A kind of battery management system and driving method thereof comprise sensing unit and MCU.The corresponding detection voltage of single battery voltage of first monocell in the storage of described sensing unit and a plurality of monocells, and measure the electric current of described battery at the end point place of the storage of detection voltage.Described MCU controls described sensing unit and measures battery current in the end of the storage of described detection voltage.

Description

Battery management system and driving method thereof
Technical field
Aspect of the present invention relates to battery management system and driving method thereof.
Background technology
Use is provided the vehicle of the internal combustion engine of power to cause serious air pollution by gasoline or diesel oil.Therefore, for reducing air pollution, made various effort recently and developed electronic or motor vehicle driven by mixed power.
Motor vehicle uses the motor of being operated by the electric energy of battery output.Because motor vehicle mainly uses by a formed battery of battery pack that comprises a plurality of rechargeable secondary monocells, so motor vehicle does not produce gaseous emission and noise is less.
Motor vehicle driven by mixed power typically refers to gasoline-electric hybrid vehicle, and it uses gasoline power to be provided and to use battery to provide power as motor as internal combustion engine.In recent years, use the motor vehicle driven by mixed power of internal combustion engine and fuel cell and the motor vehicle driven by mixed power of use battery and fuel cell to grow up.Fuel cell directly obtains electric energy by producing chemical reaction at hydrogen and oxygen when without interruption.
To use the power output of battery in order improving, to have increased the number of rechargeable monocell, and use battery management system (BMS) to manage a plurality of monocell connected to one another effectively as the vehicle of power supply.
Charged state (SOC) and health status (SOH) that open circuit voltage (OCV) when specifically, BMS starts car engine by measuring and current value come estimating battery.In this case, can use switch to measure this OCV and current value.
When using switch to measure OCV and current value, the sequential that is used to measure OCV and current value may change owing to the connection and/or the shutoff of switch.For example, switch to turn on and off current value preset time section before OCV measures sequential that sequential may make battery measured, thereby make BMS before the preset time section, to measure current value.As mentioned above, the connection of switch/shutoff operation can make the sequential of measuring OCV and current value be changed.
Disclosed above-mentioned information only is used to strengthen the understanding to background of the present invention in this background technology part, so it may comprise the information that is not formed in this country to the prior art known to those of ordinary skills.
Summary of the invention
Aspect of the present invention provides a kind of battery management system and the driving method thereof that can control the sequential of measuring single battery voltage and battery current.
Exemplary battery management system (BMS) management according to aspects of the present invention has the battery of a plurality of monocells.
According to aspects of the present invention, BMS comprises: sensing unit is used for storing the corresponding detection voltage of single battery voltage with first monocell of a plurality of monocells, and is used for measuring the electric current of described battery when finishing the storage of described detection voltage; And MCU, be used to control described sensing unit is measured described battery when finishing the storage of described detection voltage electric current.
Exemplary BMS according to aspects of the present invention comprises a plurality of monocells and is connected to a plurality of monocell relays of described a plurality of monocells respectively.
According to aspects of the present invention, BMS comprises: the current sensor that is used to detect the electric current of battery; Sensing unit, the corresponding detection voltage of single battery voltage that is used to store and transmits by one of described a plurality of monocell relays, and be used to control described current sensor and when finishing the storage of described detection voltage, measure battery current; And MCU, be used to control described sensing unit and when finishing the storage of described detection voltage, measure battery current.According to various aspects of the present invention, the moment of described sensing unit after the storage of finishing described detection voltage generates and the corresponding signal of described detection voltage.
Exemplary driver method according to aspects of the present invention drives the BMS that comprises a plurality of monocells and be connected to a plurality of monocell relays of described a plurality of monocells respectively.
According to aspects of the present invention, described driving method comprises: storage and the corresponding detection voltage of single battery voltage by the transmission of one of described a plurality of monocell relays; When finishing the storage of described detection voltage, measure battery current; And after the storage of finishing described detection voltage, measure described detection voltage.
As mentioned above, according to aspects of the present invention, can measure single battery voltage and battery current exactly by the sequential of control survey single battery voltage and battery current.
Others of the present invention and/or advantage will partly be put down in writing in the following description, and will partly become apparent according to specification, maybe can know by practice of the present invention.
Description of drawings
These and/or others of the present invention and advantage will be understood according to below in conjunction with accompanying drawing the description of embodiment being become obviously and is easier to, in the accompanying drawing:
Fig. 1 is the schematic diagram of according to aspects of the present invention battery, battery management system and ancillary equipment.
Fig. 2 is the illustrative arrangement of the battery management system of Fig. 1.
Fig. 3 be according to aspects of the present invention sensing unit and the schematic diagram of MCU.
Fig. 4 is the detailed view of voltage detection unit of the sensing unit of Fig. 3.
Fig. 5 is the single battery voltage of measurement battery according to aspects of the present invention and the sequential chart of electric current.
Fig. 6 is the flow chart of the process of the single battery voltage of measurement battery according to aspects of the present invention and electric current.
Embodiment
Now will be in detail with reference to aspect of the present invention, example of the present invention is shown in the drawings, and wherein identical Reference numeral is represented components identical all the time.In order to explain the present invention, below will be by describing these aspects with reference to the accompanying drawings.It should be appreciated by those skilled in the art that and to make amendment to described each side in various mode, and do not deviate from the spirit or scope of the present invention.Therefore, it is indicative in essence that accompanying drawing and description should be considered to, rather than restrictive.In addition, unless be explicitly described as on the contrary, speech " comprises " and is appreciated that hint comprises described element but do not get rid of any other element.
With battery management system and the driving method thereof that is described in greater detail with reference to the attached drawings according to aspects of the present invention.Fig. 1 is the schematic diagram of according to aspects of the present invention battery, battery management system and ancillary equipment.Fig. 2 is the illustrative arrangement of the battery management system of Fig. 1.In addition, will the Vehicular system that use battery be described in more detail.
As shown in fig. 1, Vehicular system comprises battery 100, current sensor 200, cooling fan 300, fuse 400, main switch 500, motor control unit (MTCU) 600, inverter 700, motor generator 800 and battery management system (BMS) 900.
Battery 100 comprises a plurality of son group a to h, lead-out terminal B Out1, lead-out terminal B Out2And be arranged in son group d and son and organize safety switch B between the e SW, each among its neutron group a to h all has a plurality of monocells that are one another in series.8 son group a to h are exemplary, and a son group is the group of a plurality of monocells, but aspect of the present invention is not limited thereto, thereby child group can be included in the more or less son group that comprises in the battery 100.Safety switch B SWManually turned on and off, to guarantee that the staff operates battery or safety when changing battery.In exemplary embodiment of the present invention, battery 100 comprises safety switch B SW, but be not limited to this, thereby safety switch B SWDo not need manual operation, but can be operated automatically.
Current sensor 200 is measured the output current value of battery 100, and the output current value of measuring is sent to BMS 900.In more detail, current sensor 200 can be by using Hall (Hall) element to measure the Hall current converter of electric current and output and the electric current corresponding simulating current signal that records, perhaps can be shunt resistor, this shunt resistor be provided at the electric current of this resistor in the loaded line and output voltage signal at flowing through.
Cooling fan 300 is removed the heat by the charge or discharge generation of battery 100 according to the control signal that offers cooling fan 300 from BMS 900, degenerates owing to temperature raises to prevent battery 100, thereby prevents that charge from reducing.
Fuse 400 prevents and may be sent to battery 100 by the overcurrent that opens circuit or short circuit causes.That is to say that when overcurrent produced, fuse 400 disconnected to prevent overcurrent.
When occurring comprising the unusual phenomenon of overvoltage and overcurrent or high temperature, main switch 500 turns on and off battery 100 in response to offer the control signal of main switch 500 or the control signal of MTCU 600 from BMS 900.
The mode of operation that MTCU 600 checks vehicles based on the information of accelerator, brake and car speed, and determine necessary information such as the moment of torsion degree.Here, the mode of operation of vehicle can comprise connection (key-on) state that is used to start engine, cut-out (key-off) state, coasting state and the acceleration mode that is used to stop engine.The switching of MTCU 600 control inverters 700, and control motor generator 800 are to have the output based on torque information.In addition, MTCU 600 sends car status information to BMS 900, and receives the charged state (SOC) of battery 100 from BMS 900, and controls the SOC of battery 100, to reach desired value (for example, 55%).For example, when the SOC that receives from BMS 900 is 55% or still less the time, the switch of MTCU 600 control inverters 700 is with by coming to battery 100 power outputs battery 100 chargings.In this case, battery current can be set to just (+) value.When SOC is 55% or when higher, the switch of MTCU 600 control inverters 700, with by coming to motor generator 800 power outputs battery 100 discharges, and in this case, battery current can be set to bear (-) value.That is to say that MTCU 600 stops the charge or discharge of battery 100 based on the SOC that sends from BMS 900.Therefore, inverter 700 makes that battery 100 can be based on the control signal of MTCU 600 and be recharged or discharge.
Motor generator 800 uses the electric energy of battery 100 to come powered vehicle based on the torque information that receives from MTCU 600.
SOC and health status (SOH) that BMS 900 comes estimating battery 100 by voltage, electric current and the temperature of measuring battery 100.In addition, BMS 900 controls the charging and the discharge of battery 100 based on SOC and SOH.
In more detail; referring to Fig. 2, BMS 900 comprises sensing unit 910, micro-control unit (MCU) 920, in-line power unit 930, monocell balancing unit 940, memory cell 950, communication unit 960, protective circuit unit 970, electrification reset unit 980 and external interface 990.According to aspects of the present invention, BMS 900 is not limited thereto, thereby BMS 900 can comprise other unshowned unit.
Sensing unit 910 is according to single battery voltage V, electric current I and the temperature T of the control survey battery 100 of MCU 920, that is to say, sensing unit 910 receives control signal from MCU 920, and measures single battery voltage V, electric current I and the temperature T of battery 100 according to this control signal.Here, single battery voltage V, electric current I and the temperature T of battery 100 are measured with analog form.Sensing unit 910 is converted to digital value with single battery voltage V, electric current I and the temperature T of the analog form of battery 100, and the digital value that converts to is sent to MCU 920.
MCU 920 receives single battery voltage V, electric current I and the temperature T of battery 100 from sensing unit 910, and measures SOC and SOH.In addition, MCU 920 generates the control signal that the sequential of the single battery voltage V that measures battery 100 and electric current I is controlled.
In-line power unit 930 uses boosting battery to give BMS 900 power supplies.The SOC of monocell balancing unit 940 each monocell of balance.That is to say the monocell discharge that monocell balancing unit 940 can be higher to SOC, and the monocell charging lower to SOC.
Storage comprised the data of current SOC and current SOH when memory cell 950 was turn-offed at BMS 900.Here, memory cell 950 can comprise non-volatile Electrically Erasable Read Only Memory (EEPROM), but aspect of the present invention is not limited thereto, therefore memory cell 950 can comprise the volatile memory such as RAM, or the nonvolatile memory of another type such as ROM, flash memory or hard disk drive.
Communication unit 960 is communicated by letter with the MTCU 600 of vehicle.That is to say that communication unit 960 sends SOC and SOH data to MTCU 600, or send the vehicle-state that is received from MTCU 600 to MCU 920.Protective circuit unit 970 be used to protect that battery 100 avoids shaking, the secondary circuit of overcurrent and low-voltage.Electrification reset unit 980 whole system that when BMS 900 starts, resets.External interface 990 is connected to MCU 920 with the auxiliary equipment such as cooling fan 300 and main switch 500 of BMS 900.In exemplary embodiment of the present invention, only cooling fan 300 and main switch 500 are shown as auxiliary equipment, but are not limited to this, and therefore output also can communicate to connect to MCU 920 about the instrument or the miscellaneous equipment of the information of BMS 900.
The method that the sequential of the measurement of the single battery voltage of the battery of BMS and electric current is controlled is described according to an exemplary embodiment of the present invention in more detail below with reference to Fig. 3 to Fig. 6.
Schematically illustrated sensing unit and the MCU according to aspects of the present invention of Fig. 3, and Fig. 4 illustrates in greater detail the voltage detection unit of the sensing unit of Fig. 3.Fig. 5 illustrates the sequential chart of electric current that is used to measure the single battery voltage of battery and battery according to aspects of the present invention.Fig. 6 is the flow chart of the process of the single battery voltage of measurement battery according to aspects of the present invention and electric current.
As shown in Figure 3, MCU 920 formation voltage control signal S VWith current controling signal S I, so that the single battery voltage V of battery and the measurement sequential of electric current I are controlled respectively.Voltage control signal S VCan comprise and be used for two or more control signals that a plurality of monocells are measured.After a while will be with reference to 4 couples of voltage control signal S of figure VBe described in more detail.In addition, voltage control signal S VWith current controling signal S ICan comprise one or more signals separately.
In more detail, MCU 920 determines the detection voltage corresponding with the single battery voltage V of battery in the voltage detection unit 912.MCU 920 Control current detecting units 911 are to measure the electric current I of battery at the end point place that charges into detection voltage.That is to say that MCU 920 generates current controling signal S in the finish time of storage detection voltage I, and with this current controling signal S ISend to current detecting unit 911.In addition, MCU 920 generates the voltage control signal S that is used to measure the detection voltage that has charged in predetermined time of delay after the section Td V, and with this voltage control signal S VSend to voltage detection unit 912.
Sensing unit 910 comprises current detecting unit 911, voltage detection unit 912 and modulus (A/D) transducer 913.
The current controling signal S that current detecting unit 911 control (Fig. 1's) current sensors 200 send from MCU 920 with basis IMeasure battery current.The analogue data of the battery current I that current detecting unit 911 received current transducers 200 are measured.In addition, current detecting unit 911 sends to A/D converter 913 with the analogue data of battery current I.
Voltage detection unit 912 is according to voltage control signal S VCharge into the detection voltage corresponding, and the detection voltage that will charge into after the section Td in predetermined time of delay sends A/D converter to the single battery voltage V of battery.
With reference to Fig. 4 voltage detection unit 912 is described in more detail.As shown in Figure 4, voltage detection unit 912 comprises a plurality of monocell relay SR1 to SR40, relay R L1 and RL2 and capacitor C.
Although the number of monocell relay SR1 to SR40 be described to number 40 with monocell corresponding 40, aspect of the present invention is not limited thereto, so the number of monocell relay can be corresponding to the arbitrary number of monocell.Further, the monocell relay need be corresponding to the number of monocell, and therefore a monocell relay can be corresponding to a plurality of monocells, and perhaps a plurality of monocell relays can be corresponding to single monocell.In this case, send to the voltage control signal S of voltage detection unit 912 VComprise the monocell relay control signal S that controls a plurality of monocell relay SR1 to SR40 respectively SR1To S SR40And the relay control signal S of difference control relay RL1 and RL2 RL1And S RL2Monocell relay SR1 to SR40 can be at monocell relay control signal S SR1To S SR40Connect respectively during for high level, and can be at monocell relay control signal S SR1To S SR40Turn-off respectively during for low level.Relay R L1 and RL2 can be at relay control signal S RL1And S RL2Connect respectively during for high level, and can be at relay control signal S RL1And S RL2Turn-off respectively during for low level.
Among a plurality of monocell relay SR1 to SR40 each is connected to a plurality of monocell CELL1 to CELL40 of battery 100 respectively.Specifically, each monocell relay SR1 to SR40 is connected to plus end and the negative terminal of one of a plurality of monocell CELL1 to CELL40 of battery 100 respectively.A plurality of monocell relay SR1 to SR40 are according to a plurality of monocell relay control signal S SR1To S SR40Be switched on or turn-off.In a plurality of monocell CELL1 to CELL40, the single battery voltage V corresponding with the monocell relay of connecting by the monocell relay SR1 to SR40 that connects is transmitted to capacitor C by the relay R L1 that connects.By by control signal S SR1To S SR40The monocell relay of connecting and by relay control signal S RL1The relay R L1 that connects, the corresponding monocell in a plurality of monocells of battery 100 is electrically connected with capacitor C.Then, the detection voltage corresponding with single battery voltage by comprising connection the monocell relay and the path of the relay R L1 of connection be stored among the capacitor C.After the detection voltage corresponding with single battery voltage was charged among the capacitor C, MCU920 is engage relay RL2 after predetermined time of delay section Td.In more detail, relay R L2 is according to relay control signal S RL2Be switched on or turn-off, and the voltage that will be stored among the capacitor C sends A/D converter 913 to.
In order to measure the voltage that charges among the capacitor C exactly, relay R L1 must be turn-offed fully.Here, predetermined time of delay, section Td should be than the time segment length who is used for turn-offing fully relay R L1.When relay R L2 connected after relay R L1 is turn-offed fully, the detection voltage that charges among the capacitor C was transmitted to A/D converter 913 by relay R L2.
Return referring to Fig. 3, A/D converter 913 will be converted to numerical data from the analogue data that current detecting unit 911 and voltage detection unit 912 send, and numerical data is sent to MCU 920.
Referring to Fig. 3 to Fig. 6, with describe in more detail according to aspects of the present invention the measurement single battery voltage and the process of battery current.For non-limiting purpose, by using among a plurality of monocell relay SR1 to SR40 stored voltage among the monocell relay SR1, single battery voltage and battery current are measured, yet aspect of the present invention is not limited thereto.
Monocell relay control signal S when high level SR1When being sent to monocell relay SR1, monocell relay SR1 is switched on (S600).In this case, as high level relay control signal S RL1When being sent to relay R L1, the single battery voltage V that is stored among the monocell CELL1 is stored in (S610) among the capacitor C by monocell relay SR1 and relay R L1.
At moment T1, promptly low level relay control signal S RL1Thereby be sent to the moment that relay R L1 is turn-offed relay R L1 fully, also promptly when finishing the storage of the detection voltage corresponding with single battery voltage V, MCU 920 generates the current controling signal S that is used to measure battery current I I, and with this current controling signal S ISend to current detecting unit 911.Current detecting unit 911 is according to the current controling signal S as input IReceive battery current I from current sensor 200, and battery current I is sent to A/D converter 913 (S620).
After predetermined time of delay section Td, MCU 920 sends the control signal S of high level to relay R L2 RL2, with engage relay RL2 (S630 and S640).Put T2 in the turn-on time of relay R L2, voltage detection unit 912 measure be stored in capacitor C in the corresponding detection voltage of single battery voltage V.That is to say that owing to relay R L2 is switched on, so voltage detection unit 912 will send to A/D converter 913 (S650) from this detection voltage of relay R L2.
A/D converter 913 will be converted to numerical data with battery current I and the single battery voltage V that analog form sends, and numerical data is sent to MCU 920.
The battery current I of other monocell relay SR2 to SR40 can measure with identical as mentioned above mode with single battery voltage V.
As mentioned above, according to aspects of the present invention, turn-offed fully at relay R L1, and the time point T1 of single battery voltage V when being stored among the capacitor C fully, measure battery current I, the measurement sequential that therefore can make the measurement sequential of single battery voltage V and battery current is by synchronously.Time slot between the measurement sequential of single battery voltage V and the measurement sequential of battery current can reduce the accuracy when measuring.Therefore, according to aspects of the present invention, can be by the measurement sequential of single battery voltage V and the measurement sequential of battery current I be obtained accurate data synchronously.In addition, because relay R L2 is switched on after turn-offing fully at relay R L1, therefore can reduce the measure error that can take place because electric current leaks.
Although illustrated and described several embodiment of the present invention, but those skilled in the art are to be understood that, can make amendment to this embodiment under the situation that does not exceed principle of the present invention and spirit, scope of the present invention limits in claim and equivalent thereof.

Claims (18)

1, a kind of battery management system with battery of monocell, this battery management system comprises:
Sensing unit is used for storing the corresponding detection voltage of single battery voltage with first monocell of described monocell, and is used for measuring when finishing the storage of described detection voltage the electric current of described battery; With
Micro-control unit is used to control described sensing unit is measured described battery when finishing the storage of described detection voltage electric current.
2, the battery management system with battery of monocell according to claim 1, the wherein said sensing unit moment after the storage of finishing described detection voltage generates and the corresponding signal of described detection voltage.
3, the battery management system with battery of monocell according to claim 1, wherein said micro-control unit generates first to the 3rd control signal, and first to the 3rd control signal exported to described sensing unit, to control described sensing unit, and described sensing unit begins and finishes the storage of described detection voltage according to first control signal, measure the electric current of described battery according to second control signal, and generate and the corresponding signal of described detection voltage according to the 3rd control signal.
4, the battery management system with battery of monocell according to claim 3 further comprises the current sensor of the electric current that is used to measure described battery,
Wherein said sensing unit comprises:
Current detecting unit, be used for according to described second control signal control the described battery of described current sensor measurement electric current and
Voltage detection unit is used for measuring described detection voltage according to described the 3rd control signal.
5, the battery management system with battery of monocell according to claim 4, wherein said sensing unit further comprises analog to digital converter, the current conversion that is used for described detection voltage and described battery is a numerical data.
6, the battery management system with battery of monocell according to claim 4, wherein said the 3rd control signal is applied in described voltage detection unit after described second control signal is applied in described current detecting unit.
7, a kind of current management system with battery of monocell, this battery management system comprises:
Be connected to the monocell relay of described monocell respectively;
Be used to detect the current sensor of the electric current of battery;
Sensing unit is used to store and the corresponding detection voltage of single battery voltage that transmits by one of monocell relay, and is used to control described current sensor is measured described battery when finishing the storage of described detection voltage electric current; With
Micro-control unit is used to control described sensing unit is measured described battery when finishing the storage of described detection voltage electric current,
The moment of wherein said sensing unit after the storage of finishing described detection voltage generates and the corresponding signal of described detection voltage.
8, the battery management system with battery of monocell according to claim 7, wherein said micro-control unit generates current controling signal and voltage control signal, controlling described sensing unit, and
Described sensing unit comprises:
Current detecting unit is used for controlling according to described current controling signal the electric current of the described battery of described current sensor measurement,
Voltage detection unit is used for measuring described detection voltage according to described voltage control signal.
9, the battery management system with battery of monocell according to claim 8, wherein said sensing unit further comprises:
Analog to digital converter, being used for the described detection voltage that will send from described voltage detection unit and described current detecting unit respectively and the current conversion of described battery is numerical data.
10, the battery management system with battery of monocell according to claim 9, wherein said voltage detection unit further comprises:
First relay is used for transmitting successively the detection voltage of described each monocell of monocell, and described first relay has first end that is connected to described monocell relay;
Capacitor is used to store the detection voltage of one of described monocell, and described capacitor has first end of second end that is connected to described first relay; With
Second relay, the detection voltage that is used for being stored in the monocell of described capacitor sends described voltage detection unit to, and described second relay has first end of second end that is connected to described capacitor.
11, the battery management system with battery of monocell according to claim 10, wherein said second relay transmit the detection voltage of being stored after described first relay turn-offs fully.
12, the battery management system with battery of monocell according to claim 10, wherein said second relay transmit the detection voltage of the monocell of being stored after described current detecting unit detects the electric current of described battery.
13, the battery management system with battery of monocell according to claim 10, wherein said second relay turn-offs and described current detecting unit transmits the detection voltage of the monocell of being stored after detecting the electric current of described battery fully at described first relay.
14, a kind of driving method of battery management system of the battery with monocell, this battery management system has the monocell relay that is connected to described monocell respectively, and this driving method comprises:
Storage detects voltage, and it is corresponding with the single battery voltage that transmits by one of described monocell relay that this detects voltage;
When finishing the storage of described detection voltage, measure battery current; With
After the storage of finishing described detection voltage, measure described detection voltage.
15, the driving method of the battery management system of the battery with monocell according to claim 14 further comprises:
Generate control signal, with the sequential of the measurement of controlling described detection voltage and described battery current.
16, the driving method of the battery management system of the battery with monocell according to claim 15 further comprises:
Described detection voltage and described battery current are converted to numerical data.
17, the driving method of the battery management system of the battery with monocell according to claim 14, the measurement that wherein detects voltage is after the scheduled time of the storage of finishing described detection voltage.
18, a kind of driving method of battery management system of the battery with monocell, this battery management system has the monocell relay that is connected to described monocell respectively, and this driving method comprises:
Connect first relay, detect voltage with storage in capacitor, it is corresponding with single battery voltage that this detects voltage;
When being stored in the described capacitor, turn-offs described detection voltage described first relay;
When being stored in the described capacitor, measures described detection voltage the electric current of described battery;
Connect second relay and be stored in detection voltage in the described capacitor with measurement.
CN200910146228A 2008-06-24 2009-06-24 Battery management system and driving method thereof Pending CN101615702A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104553839A (en) * 2013-10-16 2015-04-29 广州汽车集团股份有限公司 On-line detection circuit and method

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101136151B1 (en) * 2010-01-27 2012-04-16 에스비리모티브 주식회사 Secondary Battery
JP5432034B2 (en) * 2010-03-31 2014-03-05 プライムアースＥｖエナジー株式会社 Secondary battery current / voltage detector
KR101174893B1 (en) * 2010-08-06 2012-08-17 삼성에스디아이 주식회사 A battery pack and method for controlling the battery pack
CN102854372B (en) * 2011-06-29 2015-01-21 北汽福田汽车股份有限公司 High-voltage bus current detection device and battery management system
KR101255248B1 (en) * 2011-07-04 2013-04-16 로베르트 보쉬 게엠베하 Battery management system and control method thereof
DE102012208350A1 (en) 2012-05-18 2013-11-21 Robert Bosch Gmbh Battery system for use in motor vehicle, is formed by controlling current measuring unit and cell voltage measuring unit with synchronized trigger signals, where cell voltage measuring unit is provided for measuring battery current
CN103066662B (en) * 2013-01-07 2015-08-05 雷星亮 emergency power supply
DE102015109285A1 (en) * 2015-04-09 2016-10-13 Weidmüller Interface GmbH & Co. KG Electrical assembly and measuring circuit and measuring method for monitoring a component of the electrical assembly
GB201523108D0 (en) * 2015-12-30 2016-02-10 Hyperdrive Innovation Ltd Battery management system
EP3264515B1 (en) 2016-06-30 2019-04-03 Shenzhen Carku Technology Co., Ltd. Smart battery jumper cable
US11811248B2 (en) 2016-07-21 2023-11-07 C.E. Niehoff & Co. Vehicle generator using battery charging profiles
KR20180057046A (en) * 2016-11-21 2018-05-30 삼성전자주식회사 Method and apparatus for controlling battery temperature
KR102344211B1 (en) * 2017-12-20 2021-12-27 주식회사 엘지에너지솔루션 System and method for diagnosing main controller abnormal operation
KR102572958B1 (en) * 2018-06-26 2023-08-30 주식회사 엘지에너지솔루션 Protecting circuit and a method for protecting of circuit using the same
KR102569634B1 (en) * 2018-06-26 2023-08-22 주식회사 엘지에너지솔루션 Circuit for protecting of battery module and a method for protecting of battery module using the same
CN108973732B (en) * 2018-07-26 2021-02-02 浙江慧众智能装备科技有限公司 Control method of power battery management system
US10770914B2 (en) 2018-11-05 2020-09-08 C.E. Niehoff & Co. Dual control loop for charging of batteries

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001086656A (en) * 1999-07-09 2001-03-30 Fujitsu Ltd Battery monitor
JP3791767B2 (en) * 2001-03-27 2006-06-28 株式会社デンソー Flying capacitor voltage detection circuit
DE10394007T5 (en) * 2002-12-31 2006-02-02 Midtronics, Inc., Willowbrook Apparatus and method for predicting the remaining discharge time of a battery
JP4116589B2 (en) * 2004-05-14 2008-07-09 パナソニックＥｖエナジー株式会社 Capacity equalization device
JP4628019B2 (en) * 2004-05-31 2011-02-09 三洋電機株式会社 Data collection device
JP4116609B2 (en) * 2004-11-04 2008-07-09 パナソニックＥｖエナジー株式会社 Power supply control device, electric vehicle and battery control unit
KR100740107B1 (en) * 2005-09-08 2007-07-16 삼성에스디아이 주식회사 Control signal generation circuit and battery management system using the same
JP4942438B2 (en) * 2006-09-25 2012-05-30 三洋電機株式会社 Power supply for vehicle
KR100839382B1 (en) * 2006-10-16 2008-06-20 삼성에스디아이 주식회사 Battery management system and driving method thereof
KR100839381B1 (en) * 2006-11-01 2008-06-20 삼성에스디아이 주식회사 Battery management system and driving method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104553839A (en) * 2013-10-16 2015-04-29 广州汽车集团股份有限公司 On-line detection circuit and method

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